Modern fishing practices threaten biodiversity primarily through the?

Question

A)accidental capture of unwanted species
B)physical destruction of marine habitats.
C)removal of community food supplies
D)chemical poisoning of the water

I think the answer is c but not sure

2. Which of the following examples of an ecological study involves the ecosystem level of organization?
A. The effects of a disease on population size
B. The effects of competition on survival
C. The effects of an invasive plant species on bird nesting sites
D. The effects of human activities on biogeochemical cycling

I think its d.

Answer 1

If I remember this correctly from 9th grade, I'd say that the answer to question number 1 is B and the answer to question number 2 is C.